Article
Environmental Sciences
Joanna C. Carey, Kevin D. Kroeger, Jianwu Tang
Summary: Salt marsh habitats are important reservoirs of soil organic carbon. The study found that the summer period is the most dynamic for marsh C gas exchange, with substantial fluxes also observed from early summer through late fall. Temperature and elevation were found to significantly impact ecosystem respiration rates.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Multidisciplinary Sciences
Katharyn A. Duffy, Christopher R. Schwalm, Vickery L. Arcus, George W. Koch, Liyin L. Liang, Louis A. Schipper
Summary: The temperature dependence of global photosynthesis and respiration influences the strength of land carbon sink, with the average temperature of the warmest quarter exceeding the thermal maximum for photosynthesis over the past decade, leading to a potential halving of land sink strength in the future.
Article
Environmental Sciences
Prakash N. Dixit, Goetz M. Richter, Kevin Coleman, Adrian L. Collins
Summary: Reducing CO2 emissions is crucial for the UK to achieve its net zero policy objective. By leveraging climate change and land use change, suitable bioenergy crops can be strategically deployed to enhance energy production and carbon sequestration. This study evaluates the potential of bioenergy crops and their response to changing climate in the upper River Taw observatory catchment in southwest England. The results indicate that a warming climate positively impacts the production of all crops considered, with colder areas benefiting more in terms of biomass. Additionally, converting permanent grassland to perennial bioenergy crops can increase production and carbon sequestration potential.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Forestry
Maricar Aguilos, Ian Warr, Madison Irving, Olivia Gregg, Stanton Grady, Toby Peele, Asko Noormets, Ge Sun, Ning Liu, Steve McNulty, Forrest Pettay, Shamik Bhattacharya, Skylar Penney, Maccoy Kerrigan, Linqing Yang, Bhaskar Mitra, Prajaya Prajapati, Kevan Minick, John King
Summary: Coastal wetlands are important ecosystems that store a large amount of carbon and have high productivity. However, they are threatened by various natural and human disturbances. By studying a coastal forested wetland, we found that climate and hydrologic factors play a significant role in carbon fluxes and balance. Air temperature, net radiation, and groundwater table depth have a strong impact on gross primary productivity, ecosystem respiration, and net ecosystem carbon exchange.
Article
Environmental Studies
Jiasheng Li, Xiaomin Guo, Xiaowei Chuai, Fangjian Xie, Feng Yang, Runyi Gao, Xuepeng Ji
Summary: Land use changes and climate change have significantly impacted the terrestrial ecosystem carbon balance in China. Research found that from 2000 to 2015, there were noticeable regional variations in carbon balance, with North and Northwest China acting as carbon sources while other regions were carbon sinks. Net Ecosystem Productivity (NEP) showed an increasing trend throughout the regions, except for the Mid-South region.
Article
Agronomy
Mika Korkiakoski, Paavo Ojanen, Juha-Pekka Tuovinen, Kari Minkkinen, Olli Nevalainen, Timo Penttila, Mika Aurela, Tuomas Laurila, Annalea Lohila
Summary: The wide-spread harvesting of forests on drained peatlands in Finland has raised concerns about its impact on carbon dioxide emissions and climate change. A study conducted in a mature peatland forest in southern Finland compared the impact of clear-cutting and partial cutting on CO2 exchange. The results showed that partial cutting resulted in significantly lower CO2 emissions in the short term, while clear-cutting continued to be a significant source of CO2 emissions throughout the measurement period. It was also found that the forest floor lost carbon both before and after the cuttings.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Environmental Sciences
Yayi Niu, Yuqiang Li, Mingming Wang, Xuyang Wang, Yun Chen, Yulong Duan
Summary: Sandy cropland ecosystems in the semi-arid region of Horqin Sandy Land are crucial for the regional carbon balance. Continuous CO2 flux observation from 2014 to 2018 revealed that the sandy cropland acted as a carbon sink, but became a net carbon source after accounting for carbon exports and imports. The carbon fluxes were greatly influenced by environmental factors at different temporal scales, with water availability playing a dominant role in explaining inter-annual variability of gross primary productivity and ecosystem respiration.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agronomy
Wenyi Xu, Bo Elberling, Per Lennart Ambus
Summary: The frequency and extent of wildfires in the Arctic have been increasing due to climate change. In this study, researchers conducted experiments in West Greenland to investigate the long-term impacts of climate warming on post-fire carbon dioxide exchange in arctic tundra ecosystems. They found that fire increased soil organic phosphorus concentrations and burned areas remained a net CO2 source five years after the fire. However, with four to five years of summer warming, the burned areas turned into a net CO2 sink.
AGRICULTURAL AND FOREST METEOROLOGY
(2024)
Article
Ecology
Laura Heimsch, Annalea Lohila, Juha-Pekka Tuovinen, Henriikka Vekuri, Jussi Heinonsalo, Olli Nevalainen, Mika Korkiakoski, Jari Liski, Tuomas Laurila, Liisa Kulmala
Summary: This study conducted CO2 and H2O flux measurements using eddy covariance technique at an agricultural grassland site in southern Finland for 2 years, finding that drought affected CO2 fluxes and significantly larger fluxes were observed in the second summer. Water use efficiency increased with leaf area index, but photosynthetic capacity per leaf area was lower during the dry summer. The annual carbon balance of the field was -57 +/- 10 and -86 +/- 12 g C m(-2) yr(-1) in the first and second study years, respectively.
Article
Biodiversity Conservation
Megan E. Wilcots, Katie M. Schroeder, Lang C. DeLancey, Savannah J. Kjaer, Sarah E. Hobbie, Eric W. Seabloom, Elizabeth T. Borer
Summary: Nitrogen deposition has a significant impact on carbon storage in terrestrial ecosystems, with low to intermediate rates of nitrogen addition stimulating responses in grassland ecosystems.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Bruna. R. R. Winck, Juliette M. G. Bloor, Katja Klumpp
Summary: Plant-atmosphere exchange fluxes of CO2 measured with the Eddy covariance method are important for assessing ecosystem carbon budgets. This study presents eddy flux measurements for a managed upland grassland in France over a 20-year period. Pre-processing and post-processing approaches were used to overcome data gaps in the long-term datasets. The resulting datasets can be used for studying the impact of climate change on grassland ecosystems and for model evaluation and validation in carbon-cycle research.
Article
Ecology
Yayi Niu, Yuqiang Li, Wei Liu, Xuyang Wang, Yun Chen
Summary: Shrub-dominated ecosystems in the semiarid Horqin Sandy Land are crucial for global ecological health and security. The effects of climate change on carbon fluxes in these recovering ecosystems have been largely understudied. Using the eddy covariance technique, we found that the semi-fixed sandy land acted as a carbon sink in wet years but a carbon source in dry years and a normal year. Water availability was the main driver of carbon fluxes, but temperature and photosynthetic photon flux density also played important roles. With future increases in precipitation and temperature, carbon sequestration in this ecosystem is expected to rise.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Agronomy
Mercedes Ibanez, Nuria Altimir, Angela Ribas, Werner Eugster, M-Teresa Sebastia
Summary: This study evaluated the impact of cereal monocultures versus cereal-legume mixtures on ecosystem-scale CO2 fluxes, showing that cereal-legume mixtures lead to higher net CO2 uptake and enhanced net CO2 sink capacity of forage crops, while maintaining productivity and forage quality over the entire growing season.
FIELD CROPS RESEARCH
(2021)
Article
Environmental Sciences
Jianhui Bai, Fengting Yang, Mingjie Xu, Huimin Wang
Summary: An empirical model of respiration and net ecosystem productivity was developed and tested in a subtropical coniferous plantation in China, with reasonable agreement between simulation and observation results. The PAR energy method was applied to capture and describe the main energy interactions in CO2 processes, leading to the development of useful empirical models for gross primary production, respiration and net ecosystem productivity.
Article
Agronomy
Xiuping Liu, Wenxu Dong, Jeffrey D. Wood, Yuying Wang, Xiaoxin Li, Yuming Zhang, Chunsheng Hu, Lianhong Gu
Summary: A three-way carbon dioxide flux-partitioning algorithm was developed and applied to a dataset of an oak-hickory deciduous broadleaf forest. The algorithm successfully separated net ecosystem exchange into aboveground plant respiration, belowground root and soil respiration, and gross primary production. It was found that belowground respiration dominated over aboveground respiration on an annual time scale, and the temperature sensitivity of belowground respiration was higher than that of aboveground respiration.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Agronomy
Qiushi Ning, Liangchao Jiang, Guoxiang Niu, Qiang Yu, Jushan Liu, Ruzhen Wang, Sha Liao, Jianhui Huang, Xingguo Han, Junjie Yang
Summary: The effects of mowing on soil microbial biomass under nitrogen enrichment are still not clear.
Article
Ecology
Hai-Yang Zhang, Xiao-Tao Lu, Cun-Zheng Wei, Jeff R. Powell, Xiao-Bo Wang, Ding-Liang Xing, Zhu-Wen Xu, Huan-Long Li, Xing-Guo Han
Summary: Understanding the mechanisms behind community assembly and biodiversity patterns is crucial in the fields of ecology and evolution. The size of an organism's genome (GS) has been suggested to potentially impact its ability to tolerate environmental stress and therefore influence community assembly. However, the role of GS in driving beta-diversity (spatial variation in species composition) is still uncertain.
Article
Ecology
Wentao Luo, Taofeek O. Muraina, Robert J. Griffin-Nolan, Wang Ma, Lin Song, Wei Fu, Qiang Yu, Alan K. Knapp, Zhengwen Wang, Xingguo Han, Scott L. Collins
Summary: Recurrent droughts caused by climate change have uncertain effects on grassland ecosystems. A 6-year experiment was conducted in a semiarid grassland, which experienced two drought periods separated by a recovery period. The initial drought reduced aboveground net primary productivity (ANPP) due to limited growth of certain plant species, but total ANPP recovered as grass productivity compensated for forb productivity. However, the subsequent drought had a greater impact on total ANPP, resulting from declines in both grass and forb productivity. Soil moisture directly influenced ANPP responses during the initial drought, and indirectly during the subsequent drought by affecting functional diversity.
Article
Environmental Sciences
Malgorzata Golub, Nikaan Koupaei-Abyazani, Timo Vesala, Ivan Mammarella, Anne Ojala, Gil Bohrer, Gesa A. Weyhenmeyer, Peter D. Blanken, Werner Eugster, Franziska Koebsch, Jiquan Chen, Kevin Czajkowski, Chandrashekhar Deshmukh, Frederic Guerin, Jouni Heiskanen, Elyn Humphreys, Anders Jonsson, Jan Karlsson, George Kling, Xuhui Lee, Heping Liu, Annalea Lohila, Erik Lundin, Tim Morin, Eva Podgrajsek, Maria Provenzale, Anna Rutgersson, Torsten Sachs, Erik Sahlee, Dominique Serca, Changliang Shao, Christopher Spence, Ian B. Strachan, Wei Xiao, Ankur R. Desai
Summary: This study synthesizes 171 site-months of CO2 flux measurements from 13 lakes and reservoirs in the Northern Hemisphere. It finds pronounced sub-annual variability in CO2 flux with nighttime emissions exceeding daytime emissions. The study highlights the importance of continuous measurements and better characterization of short- and long-term variability for accurate carbon budgeting.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Ecology
Wentao Luo, Robert J. Griffin-Nolan, Lin Song, Niwu Te, Jiaqi Chen, Yuan Shi, Taofeek O. Muraina, Zhengwen Wang, Melinda D. Smith, Qiang Yu, Alan K. Knapp, Xingguo Han, Scott L. Collins
Summary: Plant traits are significant indicators of plant strategies and can affect how communities and ecosystems respond to climate extremes, such as severe drought. However, there is limited research on the immediate and delayed effects of drought on community-weighted mean (CWM) plant traits, particularly regarding the roles of interspecific and intraspecific trait variability in these responses.
FUNCTIONAL ECOLOGY
(2023)
Editorial Material
Biodiversity Conservation
Jiquan Chen
GLOBAL CHANGE BIOLOGY
(2023)
Article
Biodiversity Conservation
Guo-Jiao Yang, Carly Stevens, Zi-Jia Zhang, Xiao-Tao Lu, Xing-Guo Han
Summary: Through a study on a temperate meadow steppe, it was found that nitrogen enrichment had a nonlinear positive effect on above-ground and total net primary productivity (NPP), but a negative effect on below-ground NPP. Soil nitrogen enrichment played a key role in driving the negative impact on below-ground NPP and the earlier occurrence of the NPP nitrogen saturation threshold. This suggests that previous studies on the positive effects of nitrogen deposition on primary productivity might have overestimated its impact on above-ground productivity.
GLOBAL CHANGE BIOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Gonzalo Rodriguez-Garcia, Hui-Chun Fu, Patrick Sullivan, Chih-Jung Chen, Zhaoning Song, Jiquan Chen, Yanfa Yan, Dawei Feng, Song Jin, Ilke Celik
Summary: Integrated solar flow batteries (SFBs) combine electricity generation and storage functions in one device, with high efficiency, compact design, and reduced electronics. However, their environmental performance is not well understood. This study presents the first life cycle assessment of a lab-scale SFB using a perovskite/silicon tandem photoelectrode and compares it with a competitor: a PV panel with the same tandem and a lithium manganese oxide battery. The results show that electrolytes contribute to around 59% of the environmental impacts, while the structure and PV component contribute 23% and 18% respectively. Replacing materials in the SFB's structure can significantly reduce ozone depletion and global warming potential impacts.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Plant Sciences
Wentao Luo, Wang Ma, Lin Song, Niwu Te, Jiaqi Chen, Taofeek O. Muraina, Kate Wilkins, Robert J. Griffin-Nolan, Tianxiao Ma, Jianqiang Qian, Chong Xu, Qiang Yu, Zhengwen Wang, Xingguo Han, Scott L. Collins
Summary: Grasslands are expected to face more frequent and severe droughts in the future. This study focuses on understanding the responses and recovery of grasslands to drought using functional traits, particularly bud and clonal traits. The research found that drought reduced total above-ground net primary productivity (ANPP) over a four-year period, but post-drought recovery was driven by the rapid recovery of rhizomatous and bunch grasses.
JOURNAL OF ECOLOGY
(2023)
Article
Ecology
Sakshi Saraf, Ranjeet John, Reza Goljani Amirkhiz, Venkatesh Kolluru, Khushboo Jain, Matthew Rigge, Vincenzo Giannico, Stephen Boyte, Jiquan Chen, Geoffrey Henebry, Meghann Jarchow, Raffaele Lafortezza
Summary: By training machine learning models, the study found that yellow sweetclover is spatially concentrated in western South Dakota, mainly in counties such as Butte, Pennington, and Corson, as well as floodplain areas around White River, Bad River, and Badlands National Park. These prediction maps can assist land managers in devising management strategies against yellow sweetclover outbreaks and can serve as a prototype for mapping other invasive plant species in similar regions.
Article
Plant Sciences
Wei Yang, Junjie Yang, Yi Fan, Quankuan Guo, Nana Jiang, Olubukola Oluranti Babalola, Xingguo Han, Ximei Zhang
Summary: The study investigates the stability of plant and soil microbial community in response to nitrogen (N) deposition. The researchers conducted a long-term field trial in a semiarid steppe, examining resistance and resilience of plants and microbes to N addition. The results show that plant resistance is negatively correlated with N application rate, while microbial resistance is independent of N rate. Mowing reduces plant resistance and resilience, but improves soil microbial resilience. This study provides important insights into the resistance-resilience relationship and offers a theoretical basis for the conservation of semiarid steppe.
Review
Environmental Sciences
Lu-Ping Qu, Jiquan Chen, Jingfeng Xiao, Hans J. De Boeck, Gang Dong, Shi-Cheng Jiang, Ya-Lin Hu, Yi-Xuan Wang, Chang-Liang Shao
Summary: Extreme heatwaves have increasingly significant impacts on global terrestrial ecosystems, with a lack of accurate prediction due to a lack of consistent understanding of the mechanisms involved. By analyzing complexity factors in heatwave studies, such as determining heatwave events, ecosystem responses, and vegetation status, this research proposes a holistic approach to understanding heatwave impacts that considers multiple stages and timeframes. The study also explores the importance of timing and different annual heatwave patterns. A conceptual framework is proposed to guide regional assessments and adaptation strategies.
ENVIRONMENTAL RESEARCH
(2024)
Article
Multidisciplinary Sciences
Fei Li, Jingfeng Xiao, Jiquan Chen, Ashley Ballantyne, Ke Jin, Bing Li, Michael Abraha, Ranjeet John
Summary: Global ecosystem water use efficiency (WUEeco) has not increased since 2001 due to the asymmetric effects of increased vapor pressure deficit (VPD), which suppressed photosynthesis and enhanced evapotranspiration (ET). Projected increases in VPD are expected to affect the coupling of terrestrial carbon and water cycles in the future.
Article
Environmental Sciences
Lulu Hou, Xiaoping Xin, Haixia Sun, Yi Tao, Jiquan Chen, Ruirui Yan, Xiang Zhang, Beibei Shen, Ahmed Ibrahim Ahmed Altome, Yousif Mohamed Zainelabdeen Hamed, Xu Wang, Serekpaev Nurlan, Nogayev Adilbek, Akhylbekova Balzhan, Maira Kussainova, Amartuvshin Amarjargal, Wei Fang, Alim Pulatov
Summary: Livestock-grassland interactions are crucial in grazed grassland ecosystems, with herbivores influencing plant community and ecosystem functions. This study investigated the effects of grazing intensity on cattle behavior in the Eurasian steppe ecosystem through a 2-year grazing intensity experiment. The results showed that grazing intensity was the main driver of cattle behavior, with foraging time, distance travelled, and utilization area ratio (UAR) increasing with grazing intensity. The study also found that canopy height, above-ground biomass, and forage quality influenced cattle behavior. These findings have implications for grassland ecosystem management and sustainability.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Plant Sciences
Pei Zheng, Ruonan Zhao, Liangchao Jiang, Guojiao Yang, Yinliu Wang, Ruzhen Wang, Xingguo Han, Qiushi Ning
Summary: Plant litter decomposition is crucial for carbon balance and nutrient turnover in terrestrial ecosystems, and is affected by anthropogenic nitrogen input. Previous short-term studies may have underestimated the real effect of nitrogen on litter decomposition. Therefore, long-term experiments are necessary to evaluate the dynamics of litter decomposition under nitrogen enrichment. In a 4-year experiment, the addition of nitrogen consistently decreased the decomposition rate of Leymus chinensis litterfall, due to changes in soil environment, microbial activity, litter quality, and plant community. The findings improve our understanding of how increasing nitrogen input affects long-term litter decomposition and terrestrial carbon cycling.
JOURNAL OF PLANT ECOLOGY
(2023)
